Only someone with insight into your specific setup and system landscape can give you that answer. We cannot give you an answer on this.
For hotel deployments, room extensions we commonly use the room number. and the will be another block which we commonly call administrator block for the hotel staff.
It all depends on your customer requirement.
We normally assign all the four phone 201 extension.
Doing so gust can pickup the call from any phones and also having 4 numbers it will be difficult for gust to remember all four and there will be definitely integration with property management solution and it will difficult for them.
